Various acrylic sprays can be used to provide color and protection. I use a clear acrylic and others have used Testors semi transparent acrylic paint to fake a solder mask.
A thin coat of acrylic is a solder through coating and you can use it prior to assembling the PCB. To a degree it will act as a solder mask. Does not work with SMD.
I have used Fusion paint on the top side of SS PCBs prior to adding a toner transfer silk screen layer. Next I coat with a clear acrylic to protect the toner or laminate a TRF to the toner to color the graphics.
Daniel Johnson
aka 3v0
--- In Homebrew_PCBs@yahoogroups.com, Myc Holmes <mycroft2152y@...> wrote:
>
> Leon,
> It's a personal preference.
>
> Some people like the "look" of a green solder mask, and it does protect the
> copper traces form oxidation and shorting.
>
> It is also another tool in the pcb making kit.
>
> Myc
>
>
>
> On Sun, Jun 14, 2009 at 9:40 AM, leon Heller <leon355@...> wrote:
>